Writing instrument



FIG. 1 is a front left perspective view of a writing instrument showing our new design;

FIG. 2 is a front elevation view of the writing instrument shown in FIG. 1;

FIG. 3 is a rear elevation view of the writing instrument shown in FIG. 1;

FIG. 4 is a left side elevation view of the writing instrument shown in FIG. 1;

FIG. 5 is a right side elevation view of the writing instrument shown in FIG. 1;

FIG. 6 is a top plan view of the writing instrument shown in FIG. 1;

FIG. 7 is a bottom plan view of the writing instrument shown in FIG. 1; and,

FIG. 8 is a bottom left perspective view of the writing instrument shown in FIG. 1.

The broken lines are included to show features of the writing instrument that form no part of the claimed design. 

CLAIM The ornamental design for a writing instrument, as shown and described. 